My yellow spots on leaf question

[Gingerbeard]

I feel like that's a trick question, ATU. I'll go with top-shelf.

[alltatup]

GB, are you trying to grow top shelf bud or mediocre bud?

[Gjourney101]

Definitely doesn't promote anything good. As long as it hasn't been there for a week or so.

[Gingerbeard]

I just realized there has been standing water in the saucers. Perhaps another issue...

[Gjourney101]

Sounds good wish you the best. Just monitor closely and keep an open mind if any other problems appear. If it's only a leaf or two, you caught it fairly early.

[Gingerbeard]

Thanks Gjourney101 My tent is open during the day and gets whatever ambient temperature and humidity there is. Nothing I can do about it. But it gets enough breeze through my front door that the plants get to rockin'. The ventilation at night is probably the issue. The temperatures are only in the lower 70's when the flaps are closed. Haven't checked humidity for a while.
Looks like I have some work ahead of me... I'll dab you what happens.

[Gjourney101]

It looks like leaf septoria. Especially if you're justentering flowering. Low humidity and air circulation are crucial. Remove the affected foliage if possible.

[Gingerbeard]

I noticed this, today, after noticing a few yellow leaves at the bottom of the plant over the last two days. The only images I can find that look like this are leaf septoria or some sort of mite. The spots are starting on the lower popcorn nugs and up to top fans. It's not a lot, at this point. The leaves are in the corner of my tent where there is less circulation and near my supply vent. There may be an air leak blowing onto the plant. I don't see any signs of living pests.
I'm about 2-1/2 weeks into flowering and have been heming and hawing about a third week defoliation. Whatever this is, I may be doing a defoliation by the end of the day
Defoliation, get the plant out of the tent, improve circulation.

Who thinks what?